Cooling device for electric lamps.



PATENTED JUNE 27, 1905. man COOLING DEVICE FOR ELECTRIC LAMPS.

APPLICATION FILED MAR. 3, 1904. v

3 UNITED STATES Patented June 27,1900.-

PATENT] OFFICE.

RICHARD upon, or HANAU, GERMANY, ASSIGNOR To THE FlRM or W. e. HERAEUS, OF-HANAU, GERMANY.

coouuecavlcs on sLEo-rmo Lamas.

srsezrxearxox forming part of Letters remnant. vowed-dated Jane 27, 1906.

for Electric Lamps, of which the followingis a specification.

As is well known, the good working of gas or vapor electric lamps comprising mercury 10 electrodes largely depends upon,the preserr vation of the pressure of the gas or vapor within the lamp so that this pressure neither exceeds nor falls behind a certain measurewide, for instance, the article by Dr. Max von 15 'Recklinghausen in the German periodical C'ntralblattflir.Elektrotechni/c, 1902, N0. 23..

For this reason the original Aarons lamp was provided with af'water-cooling device, while Hewitt employs special cooling or condensing 2o chambers blown or molten upon the lamp parts outside the are part for regulatin; the

pressure of the vapor.

My invention relates to asimple cooling and (1". 'By suitably proportioning' these cooling-surfaces the pressure of the gas or vapor device in such gas or vapor elect'ric lamps 5 whereby the same result can be obtained; and

the objects of my'improvcmentare, first, to provide the electrodes of the lamp on the outside with metallic mantles, and, second, to

. connect vthese mantles with ribbed metallic .50 plates which i culating air, so that the electrodes are suilipresent large so rfaccs to the ci rciently cooled and the pressure of the gas or vapor within the lamp never exceeds a certain predetermined limit. I attain thcse'ob- 3 5 jects by the device illustrated in the accompanying drawings, in which-- I Figure 1 is an elevation of a gas or vapor electric lamp vided with my-cooling in the direction-from right to left in Fig. 1.

. Similar letters of refcrence.refer to similar parts in both views.

My trials have shown that the coolingof 45 the two electrodes of the lamp can be effected in a mode of execution and pro-' device, and Fig. 2 1s 4 a side view of the right part-of the same seen Application filed Earth a, 1904. Serial sol 190,401.

'whichnormally contain mercury as electrmles. This lamp is connected with the respective circuit by means of the two poles fandgi The two glass parts a and l: are wrapped up with thin metallic foil and secured on two ver tical metallic plates 0 and c by means of two 1 metallic clasps e and e'and the screwsh h and .h It, the two clasps, embracing the metallic foils, and thus fconductively connecting the latter with the metallic plates. shown in the drawings, the two metallic plates As is clear] y c and c are on their rear sides provided with I vertical ribs (land (1, respectively, whereby their surfaces in conta'ctwith the ambient air are considerably increased; in asimilar mans ner'as the surfaces of theilrnown ribbed radi M y ators. The two plates'c. and a mayform parts of two supports i'and 2'', respectively. It will be evident "that during the work' of the lamp' both mercuryelectrodes will be effectively cooled by the-risingair passingalong.

the vertical surfaces of the two clasps e and c' and the two plates 0. and c and their ribs 11 bination with a lamp-tube containing mercury 25 an electrode, of ametallic'mantlc inclosing said electrode, and a radiator in contact with the ambient air and conductively connected with said metallic mantle.

' 3. In a gas or vapor electric lamp,-the combination with a lam p-tubccontaining mercury as an electrode, of a metallic foil inclosing said lamp-tube, a vertical metallic: plate provided with a plurality of vertical ribs and serving as a radiator, and a metallic clasp seeuri11g' ald=ixmp-tube on said vertical metallic}platemdhonductively commuting: the lat-- ter with eeld' mefiallic foil.

4, 1n a-gas' ofmwr electric lamp; the com-- blnat ion wit-h a lamp-lube cont-ainihg mercury w an electrode, of .a eondpetlng-clasp about saj elecl-rocle andaiadiatorwnducti vely eonnectfi to snid'lasp,

blnkbie'ay'ith'a lamp-tube containing mercury as an eletrode, of a metalhc clasp about said electrode and a radiator cunducmvely cunneeted to said clasp.

6. In a gas or vapor electric lamp, the cum biggxtion'with a lamp-tube containing mercury aghpelectmde, of a metallic clasp about said elehti'ode, am! a metal plate cenduetively con nected" t ;e-aaid clasp.

7. In a gas or wzpor electric lamp, thecomhination with a lamp-w be contai ning' mercury as an electrode, of a metallic foilinelosin'g 3 bination with a lamp tube containing mercury Y 5. In; gas or vapor electric' lamp, the cdmas an electrode, of metallic radiat ors connected conductiveh'wit-h :sgzld tube, as and for the puvpose iijtfort-hr" In tehtimcny whereof I have signed m y name to tlus specification m the presence of two subscribing witnesses.

- RICHARD KUCEL Witnesses? 'FRANZ HASSLACHER,

Mxcmmx. -VoLK.- 

